Visible optical spectra of [MATH]-irradiated uranium - doped ZBLAN fibres S. MAGNE, G. BOISDÉ, G. MONNOM, Y. OUERDANE, M. DRUETTA, J.P. GOURE et G. MAZÉ J. Phys. IV France, 04 C4 (1994) C4-451-C4-454 DOI: 10.1051/jp4:19944108